| Meeting | Topic | Speaker | Sponsor |
| 11-14-11 | Sonora, Mexico ![]() |
William "Butch" Wulftange Director of Exploration and Business Development ![]() |
Gerardo Fernandez ![]() Kaitlin Sweet |
| 10-10-11 | Humbolt and Pershing Countys, Nevada The deposit model is an epithermal hot springs system that vented to the surface ~4 Ma. The Bay area contains evidence of upper level sinter and reed casts, where the system vented along a prehistoric lake shore. This material transitions downwards into intensely silicified and brecciated zones, which reflect continued hot springs activity, over pressuring, and subsequent brecciation. Multiple events of silicification and brecciation are noted in the Vortex area. The mineralizing event was followed ~0.4 to 2.0 Ma by an intense acid leaching event as a result of outgassing of the hot springs system. This allowed the formation of sulfuric acid, which leached the upper portion of the deposit. The acid leach zone, noted at both Central and Brimstone, is underlain by a zone of intense silicification, with propylitic, and argillic alteration marginal to the deposit. The acid leach zone also contains large areas of native sulfur deposits. Oxidation of the original sulfide mineralization is variable in depth, depending upon the water table, proximity to faults, and extent of acid leaching. Sulfide content in the unoxidized material is variable, averaging 1.5-2.0% in mineralized material, with up to 11% sulfide sulfur in assays. The deposit is hosted in both Tertiary Camel Conglomerates and Kamma Mountain Volcanics, which were formed during the Miocene to Quaternary. Jurassic aged Auld Lang Syne forms the underlying basement rock, and drilling has not penetrated out of this formation at depth. Lacustrine sediments associated with Lake Lahontan overlie the deposit along the west side. The stratigraphy is down dropped to the west, along a series of north to northeast trending normal faults, which served as both feeders and structural offset to mineralization. Discontinuous E-W trending normal faults intersect the N-S south fabric, and provide a series of horst and grabens within the deposit. At present the Hycroft Mine has placed approximately 3.22 Moz gold and 13.8 Moz silver under leach since 1983, and the geologic resource is estimated at approximately 14 Moz gold and 588 Moz silver. Exploration continues to expand the resource with increase in gold and silver resources of approximately 90% and 77% respectively from 2009-2010. |
Don Harris and Mark Gorman![]() |
James Bellegante 3303 North Sullivan Road Spokane, WA 99216 509-928-3333 |
| 9-12-11 | How will this economic "juggernaut" affect the U.S. minerals industry? Elaine Herron, an exploration geologist, has spent the last 13 years of her career living and working with her husband Cal in China, specializing in minerals project generation and management for foreign and domestic mining and exploration companies. In the process of innovating new business structures for foreign companies the Herrons interface on many levels with Chinese government agencies. Elaine has witnessed dramatic changes in how the Chinese government views domestic minerals development, how they manage foreign direct investment (FDI) into their own industries, and how they’re implementing outbound investment policies in the resources sector. She will be offering insight into:
|
Quest Geological Consultants; Reno, Nevada Beijing Kewen Minerals Consulting Limited; Beijing, P. R. China
elainelherron@yahoo.com Along with their Chinese partners, the Herrons currently own and operate Beijing Kewen Minerals Consulting Limited, a geological consulting firm located in Beijing. Cal and Elaine have also maintained their Reno-based company, Quest Geological Consultants, conducting worldwide minerals exploration, project management, and business development for numerous resource companies over the past 30 years. |
![]() Darrell Tweidt Business Development Manager North American Rotary 3707 Manzanita Lane Elko, NV 89801 775-753-8710 |
| 5-9-11 | The Good and The Ugly of Oil Development An overview of environmental protection progress in Alaska and the Gulf of Mexico BP spill. Ken learned about communication electronics from the Army, earned a EE degree and worked for Texas Instruments for three years. While at TI he earned an MBA and then went to work for ARCO Oil and Gas Company. After 2 years in the Gulf of Mexico, the next 24 years were spent in Alaska. He worked in finance, construction, production, materials, Fire and Safety, Environmental permitting, auditing, and retired in 2007 after several years as the ConocoPhillips Alaska Vice-president of Health, Safety, Environmental, Emergency Response and Native Community Relations. He was directly involved in four state legislative bills that were passed in Alaska and joined the Polar Bear Club in 2002 by swimming in the Arctic Ocean. |
Ken Donajkowski Conoco Phillips, retired 2008 |
Sarah Lightner |
| 4-11-11 | Hydro-Jex: Heap Leach Pad Stimulation Technology The Hydro-Jex technology has been used on Newmont Mining's gold heap leach pads on the Carlin Trend for three years to recover the inventory gold and change the chemistry in the pads. This research and development patented process is complete with the resultant data presented. Information on drill sampling, geophysical surveying, followed by leach pad stimulation with impacts on solution chemistry and gold recovery are discussed. Can this technology be used to rinse and close heap leach pads faster with reduced pump energy costs and improved recovery? |
Professor Thom Seal, Ph.D. Mackay School of Mines |
![]() Tom John |
| 3-14-11 | Pebble Project The potential for a mine at the Pebble Deposit located in Southwest Alaska has captured the attention of the mining industry and nearly all Alaskans. This world class copper, gold, and molybdenum deposit has brought a major public policy decision to the forefront in Alaska about mining, its legacies, and its role in the modern economy. There is a well-funded, organized campaign to stop the development , but there is also equal interest in the opportunities it could bring. Pebble Partnership CEO John Shively will share his views about one of the most interesting prospects in mining today. |
John Shively, CEO
![]() |
![]() Mike Lortie |
| 2-14-11 | Copperstone Project American Bonanza Gold Corp. (BZA.TO) will re-open the Copperstone Mine in La Paz County, Quartzsite, Arizona. Speakers Joe Fabrizio (Geologist) and Todd Fayram (Engineer) will discuss the geology, mining economics of Copperstone. The talk will include the geologic background of Copperstone, the economics of the high grade gold, mining methods of extraction, and the gold recovery technique. |
Joe Fabrizio![]() |
David Carlson |
| 1-10-11 | Afghanistan Geology, Exploration and Mining: Ending the War and Getting the Army Out |
Alex Chaihorsky Senior Advisor to the US Department of Defense Chief of Exploration for DOD & USGS mining & exploration projects in Afghanistan |
![]() Clark West, Western Region Manager 2000 E. Newlands Dr., Fernley, NV 89408 |
| 11-8-10 | Autonomous Vehicle Technology in Mining: How It Works, How It’s Applied, and When It's Coming |
Mel Torrie email Chris Brown |
Scott Manoukian |
| 10-11-10 | Yucca Energy Park | ![]() John Dunn |
Judi Tallman |
| 9-13-10 | Tim Arnold General Moly Corp |
Mount Hope Mine Eureka County, Nevada |
![]() Tim Arnold |